The throttle linkage is not binding.

When testing vehicles equipped with steering wheel controls, the steering wheel must be rotated to each stop position while testing the cruise control signal circuits. This will assure the integrity of the (SIR) coil.

Step
Action
Values
Yes
No

Schematic Reference: Cruise Control Schematics

1 Did you perform the Diagnostic System Check - Vehicle?

2 Raise the vehicles drive wheels. Refer to Lifting and Jacking the Vehicle in General Information.
Start the engine.
Place the transmission into drive.
Observe the speedometer in the instrument panel cluster (IPC).
Does the speedometer operate properly?

3 Turn the ignition OFF.
Disconnect the cruise control module.
Turn the ignition ON, with the engine OFF.
Connect a test lamp between the ground circuit of the cruise control module and battery voltage.
Does the test lamp illuminate?

Yes - Go to Step 4
No - Go to Step 27

4 Turn the cruise control on/off switch OFF.
Connect a test lamp between a good ground and each of the following circuits:
The cruise control on switch signal circuit

The cruise control set/coast switch signal circuit

The cruise control resume/accel switch signal circuit

Does the test lamp illuminate for any of the signal circuits listed above?

Yes - Go to Step 12
No - Go to Step 5

5 Turn the cruise control on/off switch ON.
Connect a test lamp between the cruise control on switch signal circuit and a good ground.
Does the test lamp illuminate?

Yes - Go to Step 6
No - Go to Step 13

6 Connect a test lamp between the cruise control set/coast switch signal circuit and a good ground.
Press the set/coast switch.
Does the test lamp illuminate?

Yes - Go to Step 7
No - Go to Step 15

Connect a test lamp between the cruise control resume/accel switch signal circuit and a good ground.
Press the resume/accel switch.
Does the test lamp illuminate?

Yes - Go to Step 8
No - Go to Step 16

8 Connect a test lamp between the cruise control release signal circuit and a good ground.

Does the test lamp illuminate?

Yes - Go to Step 9
No - Go to Step 17

9 Apply the brake pedal.

Does the test lamp remain illuminated?

Yes - Go to Step 19
No - Go to Step 10

10 Measure the voltage at the cruise control engaged circuit.

Does the voltage measure near the specified value?
B+
Yes - Go to Step 11
No - Go to Step 21

12 Test the suspected signal circuit for a short to voltage. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Yes - Go to Step 32
No - Go to Step 25

13 Test the cruise control on switch signal circuit for an open, for a high resistance, or for a short to ground. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Yes - Go to Step 32
No - Go to Step 14

14 Test the ignition 3 voltage circuit of the cruise control switch for an open, for a short to ground, or for a high resistance. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Yes - Go to Step 32
No - Go to Step 25

15 Test the cruise control set/coast switch signal circuit for an open, for a high resistance, or for a short to ground. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Yes - Go to Step 32
No - Go to Step 25

16 Test the cruise control resume/accel switch signal circuit for an open, for a high resistance, or for a short to ground. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Yes - Go to Step 32
No - Go to Step 25

17 Test the cruise control release switch signal circuit for an open, for a short to ground, or for a high resistance. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 32
Go to Step 18

18 Test the ignition 3 voltage circuit of the cruise control release switch for an open, for a short to ground, or for high resistance. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Yes - Go to Step 32
No - Go to Step 23

19 Test the cruise control release switch signal circuit for a short to voltage. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Yes - Go to Step 32
No - Go to Step 23

20 Test the stop lamp switch signal circuit of the cruise control module for an open or a high resistance. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Yes - Go to Step 32
No - Go to Step 26

21 Test the cruise control engaged signal circuit for an open, for a high resistance. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Yes - Go to Step 32
No - Go to Step 22

22 Test the vehicle speed signal circuit for an open or for a high resistance between the cruise control module and S217. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Yes - Go to Step 32
No - Go to Step 23

23 Inspect for poor connections at the harness connector of the cruise control release switch. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems.

Did you find and correct the condition?

Yes - Go to Step 32
No - Go to Step 28

24 Inspect for poor connections at the harness connector of the powertrain control module (PCM). Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems.

Did you find and correct the condition?

Yes - Go to Step 32
No - Go to Step 29

25 Inspect for poor connections at the harness connector of the turn signal/multi-function lever (Monte Carlo) or of the steering wheel control switch assembly (Impala). Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems.

Did you find and correct the condition?

Yes - Go to Step 32
No - Go to Step 30

26 Inspect for poor connections at the harness connector of the cruise control module. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems.

Did you find and correct the condition?

Yes - Go to Step 32
No - Go to Step 31

27 Repair the open in the ground circuit of the cruise control module. Refer to Wiring Repairs in Wiring Systems.